--TEST--
Traits can fulfill the requirements of abstract base classes.
--FILE--
<?php
error_reporting(E_ALL);

abstract class Base {
    abstract function sayWorld();
}

trait Hello {
    public function sayHello() {
        echo 'Hello';
    }
    public function sayWorld() {
        echo ' World!';
    }
}

class MyHelloWorld extends Base {
    use Hello;
}

$o = new MyHelloWorld();
$o->sayHello();
$o->sayWorld();

?>
--EXPECTF--
Hello World!